The First Amendment is a very high hurdle. The school will never be prosecuted for teaching, regardless of the topic. The place can be nailed for fomenting violence once students put their “lessons” to practical use. But schools, churches, mosques can spew all the violence and hatred they please. I wonder about “contributing to the delinquency of a minor”, a very popular phrase.

Ok, it’s not anything like hate, terrorism assasination, ..(the ones some of you mentioned) because that’s too obvious? But then is it? There’s @stanleybmanly‘s _ “But schools, churches, mosques can spew all the violence and hatred they please.“_
Can the court say to a private school “You cannot teach x if you’re going to require the applicants to abide by belief x. What could you imagine this belief to be?
By the way x is taught in most general universities. It’s like medicine or architechture or engineering or and on and on and on.

@RedDeerGuy. In this country you may be required to adhere to formal requirements to qualify for accreditation or some other recognition of “legitimacy”. But if you don’t care about such trivialities, you can teach whatever you please. If your institution decides to only give instruction in devil worship, it’s perfectly legal.